[AVSorrell]

Thanks for the advice Terry - I removed both the 6L6 tubes and the measurements were much closer to what they should be. Also for 6L6 tubes I have, one is metal and the other a 6L6GT:
First 6L6 (farthest left looking from the bottom) I get:
Pin 1 - nc
Pin 2 - Should be: 6.3 vac I get: ~6 vac
Pin 3 - Should be: 290 vdc I get: ~335 vdc
pin 4 - Should be: 300 vdc I get: ~335 vdc
pin 5 - Should be: -20 vdc I get: .001 vdc
pin 6 - nc
pin 7 - Should be: 0 I get 0 (grounded)
pin 8 - Should be: 0 I get 0 (grounded)

for the secoond 6L6 I get:
Pin 1 - nc
Pin 2 - Should be: 6.3 vac I get: ~6.0 vac
Pin 3 - Should be: 290 vdc I get: ~335 vdc
pin 4 - Should be: 300 vdc I get: ~335 vdc
pin 5 - Should be: -20 vdc I get: .001 vdc
pin 6 - nc
pin 7 - Should be: 0 I get 0 (grounded)
pin 8 - nc

I also now get 350 vdc for the filter cap positive to can ground (should be 385) and 350 for the filter cap positive to chassis ground. I also check that I have the positive of the 10 mfd elecro. cap going to ground and I do. Much better than before! Looks like I need new 6L6G tubes!